Trig Functions
SIn= Opp/Hyp
Cos= Adj/Hyp
Tan= Opp/Adj
Fundamental Trigonometric Identites
Reciprical Identities
Sin u=1/csc u
Csc u=1/sin u
cos u=1/sec u
sec u=1/cos u
tan u=1/cot u
cot u=1/tan u
Quotient Identites
tan u=sin u/cos u
cot u=cos u/sin u
Cofunction Identites
sin(90-u)=cosu
csc(90-u)= sec u
cos(90-u)=sin u
sec(90-u)=csc u
tan(90-u)=cot u
cot(90-u)=tan u